Elevator



April 24, 1928.

J; DARBY ET AL ELEVATOR Filed April 30. 1.926

3 Sheets-Sheet 1 6 April 24, 1926. 1,667,068 J. DARBY ET AL I ELEVATOR Filed April 50. 1926 s sheets-Shea. 2 6

1 1| @mulm mm; 3 VA A 1 9 w 6 a n y 6 April 24, 1928. 1,667,068

J. DARBY ET AL v ELEVATOR Filed April 50. 1926 5 Sheets-Sheet 3 WWW "If INVENTORY I WA/M 4 Patented Apr. 24, 1928.

.- UNITE D STATES pAT- NT C JOHN DARBY,

OFPHILADELPHIA,PENNSYLVANIA, AND cmuron w. 01.13.01 MONT- GLAIR, NEW J'ERSEY, ASSIGNOBS, BY MESNE ASSIGNMENTS, TO'S HUR LOG ELEVA- TOR SAFETY' COBPORATION, OF NEWARK, NEW JERSEY, ACORPORATION 01 'NEW JERSEY.

' ELEVATOR.

Application filed April 30, 1926. Serial No. 105,742.

I This invention is concerned particularly with the operation of elevator shaft doors, such as are commonly actuated manually through the intermediary of toggle levers. 5 One object of the invention is to provide improved. means,

ment of the toggle lever system, for preventing the opening of the shaft door from the outside when it is in nearly closed position. Another object-oftheinvention isv to provide improved means, actuated by the movement of the toggle levers to lock in neutral position bywhich the movement of the car .up or down is determined by the operator.

The invention will be described more fully hereinafter with reference to the accompanying drawings in which it is illustrated as embodied in a convenient and practical form and in which: V

Figure 1 is a view in elevation fromthe inside showing in full lines a portion of a shaft. door and its operating toggle system in closed position,

is open being indicated by broken. lines.

Figure 2 is-a view partly shown in Figure 1, and in elevation and partly in vertical. section,

a portion of, the'elevator carv with its'controh element and locking rod.

Figure 3 1s a shown at the right hand in Figure 1.

I I Figure 4E-is a detail view in elevation and pos1t1on in the movement on a larger scale of some ofthe parts shown at the lower right-hand corner of Figure 1..

I view ind-elevation of the parts shown in Figure4 and at the lower left-hand corner of Figure 2, as seen,

Figure 5 is a detail 4 from the left-handin Figure4. Figure. 6 is a' detail view illustrating the connection gle lever system and the door. 6

' indicated by the line 7-7 of Figure 6.

In the embodiment of-the invention illustrated in the drawings, a shaft door, arranged to slide horizontally, with an operating dependent upon the move- I position.

the control element Y .the position of the door and its toggle system when. thedoor in elevation as" seen from the left-hand, of the parts.

showing also, partly.

detail viewin elevation and on a larger scaleof some of the part-s is then swung to the .Qf' the door and in elevation. between the -tog-- Figure 7 is a view in section'on, the plane a door, even in closing,

thecar is locked in neutral posltion so that is shown at a, toggle lever system con-- sisting of the member I), pivotally connected] with the door a, as shownfata in Figures way, pivotally connected, with the member b atv b r and formed-as usual for engagement a'bracket 0 atone side of the shaft-.,

with a stop pin-b to prevent flexing of the toggle-lever systembeyond the straight line The ,toggle lever member If is also connected, as usual, through a/rod d witha :spring; containing cylinder d by" which the doorischecked in its opening movement and-by which the closing ;move-" ment of the :door may be effected in whole I or in part.

On the toggle member b is piv tally in the position shown in Figures 1 and 3 do or, ride soverla rack 0' formed on the bracket 0 or otherwise fixed on the wall of the shaft way. In the openin movement of the ,door, the dog-rides free y over the rack. a. and offers. no obstacle to the opening. ofthe door, but after the doghas been raised above the jrack,as in the complete opening of-the door, as indicated by'broken lines inFigujreJl and by broken lines in the extreme 'upperor right-hand osition, indicated inFigure 3, andtherea ter, as in the last of the closing the dog rides downover the rack, the dog position shown by broken lines'in Figure 3,

of thetoggle lever. At this time,

edge of the door "s near the left-hand jamb experience has shownthat atsuch timesjit sometimes happens that a belated traveler, seeing that the door has not been completely closed, inserts his hand in the open space between thedoor and the 'jamband tries toreopen the door.;

Throughout the greater part of the movement of-the the control element of the car cannot be made to move either up or down, butwhen the door is nearly closed, thatfis,'with .its leading edge within a few inches of the adjacent jamb. the control elemovement of the door,

in the intermediate of 'the door, the leading,

,mounteda dog e which hangs normally by ts'own weight and in the movement of the toggle member,.1n the first part of the open- 1ng-movement of the ment is usually unlocked, so that the reopen- V make the locking of the door, as describech the dog will then tion, shown inl'ull linesln Figures 1 and 3, so that it will permlt the opening of the the door and will, therefore, prevent suchundesirable opening of the door. WVhen,

however, the door reaches or nearly reaches its completely closed position, the tooth e of the rack and swingto its normal posithe dog 0 will pass below door from its fully closed position, when there can be no longer danger of accident.

Ithas been found desirable,- in the ment of the present invention, not only to dependent upon the movement of the toggle lever system, throug'hthe mounting: of the dog 6 on one member of said system, but to make the locking of the elevator control also dependent upon the movement of the toggle lev'er member b toggle lever system, rather than upon the movement of the door itself. Accordingly, in order to'carry out this part of the invention, there is pivotally mounted on the a "bell crank lever 7 which carries at the end of one arm 7" there of a roller f i on the edge of "a controlplate 0 In the first part of=theupward movement of the toggle member 11 in the first part of the opening movement of 'the"do01, the roller f rides against the nearly vertical edge of thefplate 0 whereby the bell-crank lever f direction, increasing"materially the upward swing 'n g movement is swung onits axis in a contrary clock-Wise of the other armof the bell crank. As soon, however, as the toggle member 6 has swung upward through a portion of its full movement, the roller f rides on the substantially concentric upper edge oi? the plate 0? so that there is no 'furthcr swinging of the bell crank lever on its axis during the continued mov'eiinent of being made to bring about at this time the toggle member.

only during the fiii' s't movement o-t the door,-th1s eflective move- The bell crank lever is thus caused to have an effective movement part of the opening ment, through suitable'ope'rative connections,

unlockin -of the control element of the car. As shown, "the arm fo't' the bell crank lever f is connected by a "link f with one arm 9 of the bell-crank g mounted on a bracket ,=p1e-re1-ab1, at the bottom of the door opcnin g. The other arm oi the bellcrank is operatively engaged with a plunger 71, mounted forhorizontalmovement in the developarranged to travel against and lever system tooperate the door, a lever bracket 9 Thereby, in the beginning of the-opening movement of the shaft-way door, the plunger h is projected from the shaft- Way wall toward the car, the floor of which is indicated at i in Figure 2. On the car is supported for horizontal movement ashoe is, which is carried by a slide mounted in guides 70 carried by a bracket Z6 The slide I Is in the embodiment of the invention illustrated, is connected by a link Z, through a yielding member Z, with an arm Z which is fixed on a shaft m mounted in a bracket '2" on the under-side of the ear .fioor. The shaft m has secured thereto a two-armed lever m m one arm of which is Weighted, as at m, to maintain the arm normally. in the position nected at its end with the lockingrod n which, as is well understood is adapted to engage the notched member 0 of the control element 0 to hold the. same in neutral position and therefore prevent movement of the car either up 'or down as soon as the opening movement of the shaftway door has commenced. The other arm of the lever m1, m is connected by a cable m with a drum m to ellect of the locking rod from the control element in emergency, such movement being permitted by the yielding connection Z".

It will be understood that various changes shown in Figure 2 and is con-- disengagement in details of construction and arrangement can bemade to suit different conditions of use andthat, except as'pointed out in the claims, the invention is not restricted to the precise construction and arrangement shown and described herein.

We claimas our invention r 1. In an elevator, the combination of a shaft-door, a toggle lever system to operate the door, arack fixed in position adjacent to the fixed pivot of the toggle. lever, and a weighted "dog pivotally mounted on the adjacent toggle member, the dog riding freely over the rack in the movement, of the toggle in the opening movement ofthe door and engaging the rack in the movement of the toggle member-in the last of the closing movement of the door to prevent movement of the toggle member in the opposite direction and opening movement of the door.

2. In'an elevator, the combination of a shaft-door, a car, aucon'trol element for :the car, a lock for the control element, a. toggle carried by one of the toggle elements, a fixed control plate for-cooperation with said lever in the movement of the toggle member, and intermediate devices whereby the control lock is actuated through the movement of said lever.

3. In an elevator, the combination of a "lever system to operate the door, alever carried by one of the toggle elements, a fixed whereby the plunger is moved by the movecontrol plate for cooperation with said lever ment of said lever.

in the movement of the toggle member, a This specification signed this 28th day of 10 shoe mounted movably .on the car and oper- April, A. D. 1926. atively connected with the lock, it plunger mounted on the shaft-way for cooperation JOHN DARBY.

with the shoe, and intermediate devices 7 CLAYTONW. OLD.- 

